Crystal growth inhibitor for glassy low dielectric inorganic composition
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United States of America Patent
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Oct 26, 1993
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N/A
app pub date -
Mar 29, 1993
filing date -
Oct 11, 1990
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Expired
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Abstract
A ceramic composition for forming a ceramic dielectric body having a dielectric constant of less than about 4.2 and a TCE of less than about 4.0 ppm/c. The composition comprises a mixture of finely divided particles of 25-50 vol. % borosilicate glass and 50-75 vol. % high silica glass and sufficient amounts of crystalline ceramic material to inhibit the formation of crystalline forms of silica. The composition can be used with a polymeric binder to produce an unfired green tape which is co-fireable with high conductivity metallurgies such as gold, silver and silver/palladium.
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